Each person consumes an average of 80 L of hot water at 40° C per day. This water, we usually get it by simply turning the tap of our sink or our sink without questioning the operating mode of our water heater. Instantaneous, with accumulation, electric, gas, thermodynamic or solar, the water heater is everywhere and does not escape innovations. So, a water heater, how does it work?
Basic principles for choosing your water heater
Some criteria are common to all water heaters irrespective of the model selected:
- The V40
The coefficient V40 corresponds to volume of water at 40° C what is able to supply your water heater everyday. This criterion is essential and must be a decisive indication at the time of your purchase.
- The NF standard
Choosing equipment benefiting from the NF standard allows guarantee optimal operation, the respect of the standards in force as well as the safety of your installation. This is the case of water heaters certified "NF electricity" or "NF electricity performance", of category B or C.
Gas, electricity, solar, aerothermal, today the available sources of energy are numerous. Do not hesitate to compare the offers available and to seek advice from a professional to find the water heater best suited to your needs: frequency of use, budget, energy saving, tax credit...
Water heater: instantaneous or by accumulation
Whether using electricity or gas, the instantaneous water heater draws water directly to the source and heats it with a resistor or burner. The quantity of hot water available is then unlimited since it is supplied on demand.
It usually takes a few seconds between the moment the faucet is turned and the hot water comes. Nevertheless, it may lack homogeneity. In addition, the instantaneous water heater must be installed near the water point, making it an ideal backup solution.
The storage water heater has a tank that stores water. This is thus heated continuously or during off-peak hours, or rather at night.
Immediately available hot water is at the top of the tank. This type of model is often a victim of corrosion or scale, however, some tanks are today equipped with an enamelled tank and magnesium or titanium anode protecting the resistance in the case of electric models.